Sheet cutter



L. HORNBOSTEL Oct. 28, 1952 SHEET CUTTER 3 Sheets-Sheet 1 Filed May 1, 1947 272517 5.1 LLOYD HORNBOSTEL.

L. HORNBOSTEL Oct. 28, 1952 SHEET CUTTER 3 Sheets-Sheet 2 Filed May 1, 1947 ZTF'EH Er LLOYD Ham/Basra.

t rlll Oct. 28, 1952 L. HORNBOSTEL 2,615,518

' SHEET CUTTER Filed May 1, 1947 k 3 Sheets-Sheet 3 4/ .JFJFEI'ZZZEF 1E 25 LLOYD- HORNBOSTEL.

Patented Oct. 28, 1952 SHEET CUTTER I Lloyd Hornbostel, Beloit, Wis.; assignor to Beloit Iron Works, consin Beloit, Wis., acorporation of Wis- 1 Application May 1 1947, Serial No. 745,144

{I'hisinvention relates to a sheet cutter mechanism and more particularly to a mechanism for. periodically severing individual sheets from the leading or oncoming end of a traveling web ,of material such as paper, paper board, etc In.a conventional apparatus of the type under discussion, a continuous web of. sheet material is fed over astationary cutter bar and is severed periodically bycoaction of a rotary cutter with the stationary cutterto produce in- .dividual sheets which are usually led away from the cutter mechanism by a suitable conveyor means. Since the whole operation is continu- -ous it.is necessary to gauge the cutting speed As a mechanism of this type is designed to operate on a production basis, it is obviousfthat .the faster the web is fed and cut into individual sheets, the-more such sheets will be obtained per .unit time. I-Iowevenit is found that as the rotary cutter: speed is increased,- there is more tendency for the cutter to catch and buckle the individual sheets as theyleave the cutter knife. .TherefOre merely increasing the Web speed and also'increasing the speedof rotation of the rotary cutter will not result in satisfactory high speed operation. I

I have found that by-correctly choosing the angle of approach at which the web is fed to the cutter knife and by also providing means for forcing the trailing edge of a freshly severed sheetout of the path of movement of the rotary cutter, it is possible to obtaineffective sheet cutting operation at higher speeds than are now commonly employed; For; example. considering-:aitypeof mechanism employing a substan- .tially horizontal stationary cutter blade with .whicha rotary cuttercoacts to-shear sheet material-passed over the stationary cutter blade, I; have found-jt l'iat by feeding the material to be ,cut over the stationary cutter blade at an nearly in line with the side surfaces of the cut;-

4 Claims. (01. 164-453) ter blades; On the other hand, if the sheet material is fed over the stationary cutter blade at too small an angle to the horizontal, difficulty that there is agreat tendency forl the rotary cutter to catch and buckle individual sheets. As

I have stated, I find'that an angle of approach of approximately fis most satisfactory.

Furthermore, .by providin means. 'fordirectingan air blast'against the freshly severed sheet adjacent its trailing edge as the sheet issevered and immediately following such severing, the

trailing edge of the sheetis moved out 'of the path of movement ofthe rotaryv cutter and hence catching and buckling of the sheet by the rotary cutter is eliminated. A mechanism having the aforementioned features is found to be more satisfactory for high speed operation than mechanisms now known to the art.

I have also found that the useof a plurality of circumferentially spaced revolving blades .makes possible a decrease in speed of rotation without loss in cutting capacity since the rotary cutter will make more than one cut per revolution. This arrangement cuts down vibration and renders a better balanced rotor.,

It is, therefore, an object of my invention to provide a newand improved method and'ap- ,paratus for severing sheets of material ata high rate of speed from a continuous length of such material.

It is another object of my invention .toprovide a new and improved method of' severing individual sheets of material from a continuous length ofmaterial in the practice of whichthe continuous length of -material is fed to the cutter knife at an angle of approach of approximately 45 and, following cutting of a sheet therefrom, the cut sheet is forced away from the path of movement of the cutter knife.

It is'afurther object of my invention to provide a new and improved mechanism for feeding a continuous length of material to a' cutting means, periodically severing individual sheets of material from said continuouslength, and forcing and leading said severed sheets away from said cutting. means. V

. It is still another object of my invention to provide a new and improved mechanism for. severing individual sheets of material from a continuous length of said material which includes means for directing an air blast against a freshly severed sheet to force said sheet out of the path of movement of a movable cutter means.

It is a still further object of my invention to provide a new and improved mechanism for severing individual sheets of material from a continuous length of said material which includes means to feed said continuous length of material to a cutter knife at an angle of approach of approximately 45 thereto and also includes means to force the trailing edge of a freshly severed sheet out of the path of movement of a movable blade of said cutter knife.

It-is another and further object of my invention to provide a new and improved sheetcutter mechanism which includes a stationary cutting blade and a multi-bladed rotating cutter wherein all of said blades are readily detachable from their supporting members thereby facilitating replacement of the blades and wherein said stationary blade is adjustable with respect to the path of movement of said rotating blade.

These and other objects and advantages of my invention will become apparent from the following .detailed descriptiontaken in conjunction with the attached drawings in which:

Fig. 1 is a side elevational view of my mechanism showing a web about to be cut;

Fig. 2 is a top plan view of said mechanism,

the web being omitted in this showing;

Fig. 3 'is a sectional view taken lengthwise of the cylindrical member which supports the movable cutter blades as is indicated from line. III-III of Fig. 4;

Fig. 4 is a cross-sectional view taken transverse of the axis of the cylindrical member which showing the manner in which the air blast forces the trailing'edge of'a freshlyseveredsheet of material out of the path of movement of the adja cent movable cutter blade.

In the embodiment of my invention illustrated on the drawings, a pair of: spaced framestands l0 and H support a pairof spaced channel bars I2 and I3. These'frame stands and channel bars constitute the main supporting framework for supporting the sheet cutter mechanism. Aplatform l4 extends to one side of the channel bar l3 and is supported by a vertical column member l5. This platform carries the machinery for driving thecuttermechanism as is described .more in detail hereinafter- On the feed side of the mechanism a pair of support bars IB extend upward from the spaced channel bars I2 and I3 and a conveyor or draw roll I! is supported for rotation by these bars. A web of sheet material |il is shown in Fig. l as being fed over the draw roll H.

A top press roll l9, which is supported for rotation between a pair of pivoted links 20 pivotally attached at 2| to the upstanding bars I6, bears against the web IS on the draw roll ll to hold the web against the draw 'roll and to deflect the web downwardly toward the cutter knife. As can be observed from Fig. l, the press roll l3 is positioned adjacent the delivery side of the draw roll I! and, by virtue of such positioning. the web I8 is deflected from the horizontal and is fed to the cutter knife at an angle of approximately 45 to the horizontal. The positioning of the, press roll I9 indicated is, of "course, chosen to achieve a correct angle of approach and, as I have previously mentioned, I find an angle of approach of approximately 45 to be most satisfactory for high speed operation with a mechanism of the type illustrated. A weight 22 biases the roll I19 "firmly against the traveling web l8 and by virtue of the coaction between the conveyor roll I 9 and the draw roll I! the web is effectively fed to the cutter knife in the manner indicated in the drawing.

This cutter knife includes a stationary cutter blade 23 and a pair of movable cutter blades 24 and 25. The stationary-cutter blade23'extends horizontally as indicated in Fig. 1 and is detachably connected to 'a bed or ledger bar '25 which also extends horizontally. As can be observed from'F'ig. 5, the bed bar '26, incross section,'is a four sided hollow member' in which the sides are connected by weld 'filletsas is indicated at 21. One side 28 of the bed bar is provided with a ledge surface'29-and'the stationary cutter blade '23 is seated upon this ledge surface and detachably secured to the bed bar by means such as the metal screws '30 shown in Fig. 5. With the construction just describedit is readily possible 'to remove and replace the stationary cutter blade 23.

Referring more particularlyto Figs. 1, 2, and 7, the bedbar 26 has, extending from 'each end thereof, 'a projection 3| and these projections rest upon upstandingsupport members 32 and 33 which are, in turn, carried by an angle iron member 34 attached to the 'underside of the channel bars l2 and |3. Referringmoreparticularly to Fig. 7,-it can be "seen thatthe u standing support member 32 includes 'a cover plate 35 which has formed therein a T-slot 36 adapted to receive the enlarged head 31 of a connecting bolt 38. The projection 3|, of course, includes an opening which will receive the shank of the bolt 38 and hence by positioning'the bolt in the T-slot 3.6 and thenpassing it through the matching opening" in the projection 3|, the connecting bolt 38 can then be tightened to secure the bed bar projection 3| to the upstanding support member 32. Inasmuch as the support member 33 is identical to the support member 32, the details of connection between member 33 and the corresponding projection-3| of the'bed bar are identical to those describedin connection with the support n'rember'32.

To secure greater rigidity of connectioma plurality of bolts 33 is employed between each'projection 3| and the upstanding support'members 32 and 33. As a matter of practice,'it is found desirable to incline the projections 3| and-correspondingly, incline the cover plates of the upstanding support members, such as the cover plate 35. With these memberssoinclinedywhen it is desired to adjust the position of the stationary cutter'blade 23, this adjustment takes place along a line which intersects the axis of rotation of the movable cutter blades. Of course. since the projections 3| 'are rigidly attached to the bed bar" by being welded thereto 'asindicated at 39, and since the stationary cutter blade 23 isalso screw connected to the bed bari23, when beneath the cutter blade .24.

the-projections 3| are shifted with respect to the cover plates 35, both the bed bar and the sta- 'tioriarycutter blade are also correspondingly "shifted. The T-slots 36 permit adjustment of the positioning of the stationary cutter blade.

The movable cutter blades 24 and 25 are detach ably secured to support bars 40 and 4| respectively by means such as metal screws 94, and

these support bars are, in turn, secured to a plurality of like brackets 42 which extend from bands 43 attached to and surrounding the shell 44fof a cylinder designated generally by the ref- 'erence numeral 45. The cylinder 45 is supported for rotation by journal members 92 and 93 mounted, respectively, on the channel bars I2 and I3. As can be observed from the drawings, 'the movable cutter blades 24 and 25 are parallel to and substantially equal in length to the stabands 43.. Hence, there are three brackets 42 for each of the blades 24 and 25. 1

' 2133.011 of the movable blades 24 and 25 has positioned adjacent thereto and substantially parallel therewith a manifold for directing air streams outwardly from the cylinder 45 as the movable blade coacts with the stationary blade. Since there is an identical manifold arrangement associated with each blade, only one such arrangement will be described in detail and that is the arrangement associated with the movable blade 24. In this arrangement, a manifold 46 extends substantially the length of the movable cutter blade 24. This manifold has a plurality of nozzles 47 which project outwardly from the manifold so as to direct individual air streams As indicated in Fig. 3, the nozzles 41 are spaced apart so that an individual air stream is projected from the manifold at spaced points along the length of I the manifold.

. By means of a T-connection 48, the-manifold 46 is connected to a conduit 49. This conduit 49 connects with a passage 5|lextended through the cylinder shaft member 5| to an inlet 52 which is adapted to register with an outlet 53 formed in a ring 54 which surrounds the cylinder shaft member 5|.- Air, from a source not shown, is

supplied to the outlet 53 through a feed conduit 55. As previously mentioned, the arrangement for the manifold 56 associated with the movable blade 25 is identical to that just de scribed in connection with the manifold 46 associated with movable blade 24 and hence it is deemed unnecessary to repeat details of description with respectto manifold 56. It might be noted, however, that an inlet 51 is adapted to register with the outlet 53 to supply air to the manifold 56 in the same manner as air is supplied to the manifold 46 through registration of the inlet 52 with the outlet 53.

. Following cutting of the web M by coaction of the stationary cutter blade 23 with either of the has a tape 6| traveling'therebetween;

Fig. 2.

sprocket or sheave 10, secured tow and rotatable to force the sheet out of the path of movement of the rotary cutter blade. This action of the air blast means,'plus the force of gravity, causes the individual sheets to drop quickly onto the inclined conveyor tapes 5& The tape-supporting rolls 59 and 66 extend substantially the distance between the channel bars I2 and I3, as viewed in Fig. 2, the individual endless'tapes 58 are spaced'apart along'these conveyor rollsto occupy a distance thereon which is substantially equal to the length of thecylindrical' member 45.

A second set of conveyor tapes 6|. is entrained about rolls 62 and 63.. These last mentioned rolls are each of a length substantially equal to the length of therolls 59 and'60 and each of the rolls 62 and 63 has its axis extending substantially horizontally. As can-be seen-from Fig.11, these rolls 62 and 63 are positioned so that the-portions of the conveyor tapes 6| extendingthere.- between are also substantially horizontal; The individual conveyor tapes 6| are spaced apart suflicientlyto receive, between each pair of tapes, a conveyor tape 58 and conversely,as has previously been mentioned, each. pair of tapes 58 By virtue of this arrangement, there is'an inclined conveyor formed of a plurality of individual belts 58 delivering conveyed material to a substantially horizontal conveyor arrangement also formed of a plurality of individualbelts 6|.

The rolls and 63 are supported for rotation by journal members secured to depending arms 64 extending downward at aniangle from chanmembers carried by depending arms 65 which are .also attachedto and extend downward? from channel bars 2 and l3. A pair of arms'66 are attached to the downwardly extending arms 65 and extend at substantially right angles therefrom, as shown in Fig. 1, to provide "a journal support for the conveyor roll 52. 61 is also supported bythe downwardly extending arms 65 and this bias roll pressesagainst theupper surface of the traveling belts 6|;

Power supply for operating the sheetcutter mechanism is furnished by a motor 68 which is supported upon the platform M which extends to one side of-channel bar I3, as is shown in A chain or belt 69 extends betwe'en a with the mo'tor shaft H, and a sprocket or sheave 12 which is rigidly secured'to'shaft-13 of draw roll Another sprocket or sheave 14 is affixed to draw roll shaft 13 anda chain or endless belt 15 is entrained over sprocket sheave l4 and also over sprockets orsheaves' I6 and 11 which are attached, respectively, to the shafts of the tape driving rolls 60 and 63.- By virtue of these powersupply connections, the draw roll I! and rolls 66 and 63 will all rotate in the same direction which, for the arrangement shown'in the drawingawwill be counterclockwise.

A gearlB is also secured to and rotatablewith the motor shaft II. This gear 18 meshe'swith and drives a second gearl'l9which, in turn, drives one pulley 86 of a conventional variable speed pulley arrangement designated generally by the reference-numeral 8| and illustrated in dotted outline in Fig. 2. This variable speed drive is of the well known type employing two adjustable V-shaped pulleys Siland 82 with a belt connection therebetween and a linkage for increasing or decreasing the effective diameter A- biasroll :approximately 45.

v :ofthe; respective pulley surfaces engaged by the -:belt :;to vary the speed of the driven shaft. csince'thisstype'of a drive is well known to the -ant,t:no further explanation thereof is deemed "necessary and-it is to be understood that this "type of "drive furnishesa variable speed drive whereby the speed of 'drivenshaft 83 can be varied asdesired relative to the speed of the shaft 13.. lRotation of shaft 83 causes rotation "ofncylinder 45,:and,-1of course, s'incethis cylinder .supports the zblades 24 and'2-5, these blades are likewise :-rotated :at aspeed dependent upon the :speed .of rotation of shaft 83. With this arrangement'it ispossible to vary the speed of irotati-ontof the movable cutter blades 24 and 25 as desired and to choose thecorre'ct speed for :a particular cutting operation.

The mechanism described above operates as follows:

A continuouslength'of web of sheet material "is fedfrom a source such asa' roll (not shown) :over draw roll I] and is extended over and against the stationary cutter blade '23 in the manner shown in'ZE'ig. 1. By virtue of the positioning of the press roll [9, the continuous web 18 is deflected from the horizontal at an angle of'approx-imately 45 to the horizontal and hence, :since the stationary cutter blade 23 also extends :horizontally, the web can be described as having .an angle of approach to the cutter knife of The angle of approach can "be varied somewhait'but angles within the range -of 35 -to 55 are preferred.

When the motor 68-is energized, the sheave 1.0 drives belt 69, which, in turn, drives sheave 12 to rotate shaft Band hence rotate the draw roll l'l-to feed web l8 toward-the cutter knife. By virtue of belt 15 which is entrained about sheaves. 1-4, 16 :and 11, both conveyor rolls 60 and '63 are rotated to drive the respective groups of conveyor belts '58 and GI. Since the conwveyor rolls 60 and 63 are rotated in a counter- -clockwise direction, the direction of travel of belts 5B and 6| is such as to lead individually cut sheets away from the cutter knife.

Simultaneously with the driving of the draw roll n and the conveyor rolls 6!! and 63, the cylinder member 45 is also rotated byvirtue of its shaft 83 and the connection of this shaft through the variable speed mechanism 8| to gear litwhich is driven by gear 18 attached to the motor'shaft H. As indicated by the arrow "in Fig. 1, "the cylinder member '45 is rotatedin a-clockvvise direction. This cylinder member is positioned so that the movable cutter blades 24 and 25 are adapted to coact with the stationary cutter blade23 to sever the web I8 across its width. Hence, as the web is fed to the cutter, the cutter is rotated to bring the movable blades '24 and 25 into periodic coaction with the stationary cutter blade 23.

Since in'the preferred embodiment of the invention shown in the drawings I show two movable cutter blades, the web I8 will be cut twice during each revolution of the cylinder 45. The length of the cut sheet will depend upon the rate of feed of the web past the stationary cutterblade and'also'upon the time it takes after one out has been completed before the next cutter blade coacts with the stationary blade to sever the web again. By means of the variable speed control 8| which controls the speed of rotation of the cylinder 45, it is possible to adjust the cutting speed so that a determinable 'ilengthof material .will becut each timea movthe manifold member 46.

able blade coacts with the stationary cutter blade.

next cut, the positioning of the web with respect to the blades whichcoact for the next cut will be as shown in Fig. 1. As shown, the leading edge 84' of the web 18 has traveled past-the stationary cutter blade 23 to the extent indicated. The movable blade 24 is just about to coact with the stationary cutter blade23 to sever the web transversely or along a transversal. At this time. 'theair outlet 53 in the ring member 54 which surrounds the cylinder shaft portion 5|, is in registry with the air inlet 52. Accordingly, there is a-continuous air path extending from outlet 53 through inlet 52, passage 50, and conduit 49 to The air supplied to the manifold 46 issues from the spaced nozzles l! beneath and in advance of the movablecutter blade 24 as this blade coacts with the stationary cutter blade 23 to sever the web I8 along the severing transversal and air also issues from'these nozzles in Fig. 8. 'Al'though' only one air stream 81 is shownin this figure, there are three such air streams 81' and they impinge against the cut sheet 85 adjacent its trailing edge 86 at three areas spaced along the width of the cut sheet in accordance with the spacing of the nozzles 41 as is shown in Figs. 2 and 3. By virtue of the'plural air streams being directed against the cut sheet adjacent its trailing edge, this trailing edge is forced down and out of the path of travel of blade 24. Such action prevents the blade 24 from catching the trailing edge 86 and buckling the cut sheet 85. After the freshly severed sheet 85 is directed away from movable cutter blade 24 in the manner just explained, it drops upon the inclined conveyor belts 58 which carry it onto the horizontally traveling conveyor belts 6| and it is led away from the cutter knife by these last mentioned belts. f

The position of air outlet 53 is adjustable so that registration of either of the air inlets 52 and 51 with outlet '53 will occur'as the movable cutter blades 24 and 25 respectively coact with the. stationary cutter blade 23. To hold the ring 54 and hence outlet 53 in the correct position, and alsoto permit some adjustmentin positioning where necessary, a tie rod 88 is provided. This tie rod is connected at one end 89jto the ring member 54 and has a threaded extension 90 at its other end extended through angle member 34. By means such as nut 9|, the amount of take-up onthe tie rod 88 can be varied to obtain the correct positioning of outlet 53. In thismanner the outlet 53 can be adjusted to have. full registration with either of the inlets 52 and 51 when the individual cutter blades 24 and 25 coact with the stationary cutter blade 23, or the outlet can be positioned to achieve less than full registration atthe time of such'coaction.

The sequenceof events described with reference to the coaction of blade 24 with stationary blade 23 is the same when blade 25 coacts with the 9 stationary blade. While I have shown two blades as being carried by the cylinder 45, it is obvious that only one blade could be employed if desired or, under certain conditions of operation, it may be desirable to employ more than two blades. However, for the speeds of operation usually encountered in apparatus of this type, I prefer to employ a two-blade arrangement for the rotary cutter substantially as shown on the drawings. With this arrangement it is not necessary to rotate cylinder 45 as fast as would be necessary if only a single cutter blade were carried thereby. However, even with the twoblade arrangement shown on the drawings, the blades will travel approximately 20% faster than the web l8 travels, and, accordingly, the air blast arrangement shown for forcing the trailing edge of a freshly severed sheet out of the path of travel of a movable blade is a necessary factor for successful high speed operation. Otherwise, the movable blade travelling faster than the cut sheet would tend to catch and buckle it. By employing an air blast arrangement of the type shown, even when a single blade is carried by the cylinder 45 and consequently the cylinder rotates faster than with a two-blade arrangement, the cut sheet can be successfully forced out of the path of travel of the rapidly moving single blade.

From the foregoing description it will be seen that I have provided a sheet cutter mechanism for severing sheets of material from a traveling web of said material which is reliable in operation and susceptible of high speed use, thereby enabling the obtaining of more sheets per unit time than is obtained by conventional types of apparatus. The combination of a correct angle of approach of the web to the cutter mechanism plus the means for forcing individual cut sheets of material out of the path of travel of the movable cutter blade successfully avoids catching of these out sheets by the movable cutter blade. Furthermore, individual parts of the apparatus, such as the stationary cutter blade and the movable cutter blades, can be readily removed and replaced if necessary and the stationary cutter blade is readily adjustable to achieve correct positioning thereof with respect to the movable cutter blades. Means are provided to adjust the speed of rotation of the movable cutter blades and the time of air blast delivery, and the whole mechanism, in the manner above described, is driven from a single power source.

While I have shown and described a particular embodiment of my invention, I wish it to be understood that I do not intend to be restricted solely thereto but that I do intend to cover all modifications thereof which would be apparent to one skilled in the art and which come within the spirit and scope of my invention.

I claim as my invention:

1. A mechanism for severing individual sheets from a continuous length of flexible material, comprising: a rotatable blade having a cuttin edge, a stationary blade having a cutting edge closely adjacent the path of movement of said rotating cutting edge for periodic shearing coaction therewith, means for feeding the flexible material between said blades, and means co-rotatable with said rotatable blade directing a fluid stream in advance of said rotatable blade toward the material immediately preceding during and 10 after shearing coaction of said blades for pressing the flexible material against said stationary edgeduring cutting of a sheet and for forcing the sheet out of the path of said rotatable blade after cutting thereof.

2. A mechanism for severing individual sheets from a continuous length of flexible material, comprising: a rotatable blade having a cutting edge, a stationary blade having a cutting edge closely adjacent the path of movement of said .rotatable cutting edge for periodic shearing coaction therewith, means for feeding the flexible material downwardly about 35 to 55 from the horizontal between said blades, and means corotatable with said rotatable blade directing a fluid stream in advance of said rotatable blade toward the material immediately preceding during and after shearing coaction of said blades for pressing the flexible material against said stationary edge during cutting of a sheet and for forcing the sheet out of the path of said rotatable blade after cutting thereof.

3. The method of severing individual sheets from a continuous length of flexible material, comprising: feeding the material past and against a cutter blade, rotating another cutting blade into shearing coaction with the first mentioned blade to sever the flexible material, and directing a fluid air stream against the material in generally fixed advanced relation to the rotating blade immediately preceding during and after shearing coaction of said blades for pressing the flexible materia1 against the first mentioned blade during cutting of a sheet and for forcing the sheet out of the path of the rotating blade after cutting.

4. The method of severing individual sheets from a continuous length of flexible material, comprising: feeding the material downwardly about 35-55 fromv the horizontal past and against a cutter blade, rotating another cutter blade into shearing coaction with the flrstementioned blade to sever the flexible material, and directing a fluid air stream against the material in generally fixed advance relation to the rotating blade immediately preceding during and after shearing coaction of said blades for pressing the flexible material against the first mentioned blade during cutting of a sheet and for forcing the sheet out of the path of the rotating blade after cutting.

LLOYD HORN'BOSTEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 15,955 Speer Nov. 25, 1924 1,001,912 Watson Aug. 29, 1911 1,109,489 Vickery Sept. 1, 1914 1,600,507 Marr Sept. 21, 1926 1,651,096 Molins Nov. 29, 1927 1,794,358 Bauer 1 Mar. 3, 1931 2,011,505 Smith Aug. 13, 1935 2,067,456 Meisel Jan. 12, 1937 2,180,204 I-Iallden Nov. 14, 1939 2,181,197 Moritz Nov. 28, 1939 2,261,967 Matthews Nov. 11, 1941 2,341,503 La Bombard Feb. 8, 1944 

